Jackie Shapiro, who was visiting Steamboat Springs from Denver, floats down the Yampa River late Tuesday afternoon on a tube. The Yampa River might look inviting for tubing, but local officials urge people who are tempted to purchase their own tubes and float the river while it remains above 1,000 cubic feet per second this weekend should take safety precautions: life vests are a must. Commercial tubing will not open until the river falls to or below 700 cfs.